Subject: 4.3+: Atheros ethernet fails after resume from s2ram, due to order 4 allocation

From: Pavel Machek <[email-masked]>
Date: Thu, 26 Nov 2015 17:34:13 +0100

Hi!

...and dmesg tells us what is going on:

[ 6961.550240] NetworkManager: page allocation failure: order:4,
mode:0x2080020
[ 6961.550249] CPU: 0 PID: 2590 Comm: NetworkManager Tainted: G
W       4.3.0+ #124
[ 6961.550250] Hardware name: Acer Aspire 5732Z/Aspire 5732Z, BIOS
V3.07 02/10/2010
[ 6961.550252]  00000000 00000000 f2ad1a04 c42ba5b8 00000000 f2ad1a2c
c40d650a c4d3ee1c
[ 6961.550260]  f34ef600 00000004 02080020 c4eeef40 00000000 00000010
00000000 f2ad1ac8
[ 6961.550266]  c40d8caa 02080020 00000004 00000000 00000070 f34ef200
00000060 00000010
[ 6961.550272] Call Trace:
...[ 6961.550299]  [<c4006811>] dma_generic_alloc_coherent+0x71/0x120
[ 6961.550301]  [<c40067a0>] ? via_no_dac+0x30/0x30
[ 6961.550307]  [<c465b16e>] atl1c_open+0x29e/0x300
[ 6961.550313]  [<c48b96f5>] ? call_netdevice_notifiers_info+0x25/0x50
[ 6961.550316]  [<c48c081b>] __dev_open+0x7b/0xf0
[ 6961.550318]  [<c48c0ac9>] __dev_change_flags+0x89/0x140
[ 6961.550320]  [<c48c0ba3>] dev_change_flags+0x23/0x60
[ 6961.550325]  [<c48ce416>] do_setlink+0x286/0x7b0
[ 6961.550328]  [<c42ded02>] ? nla_parse+0x22/0xd0
[ 6961.550330]  [<c48cf906>] rtnl_newlink+0x5d6/0x860
[ 6961.550336]  [<c407f8a1>] ? __lock_acquire.isra.24+0x3a1/0xc80
[ 6961.550342]  [<c4047ae2>] ? ns_capable+0x22/0x60
[ 6961.550345]  [<c48e7c5d>] ? __netlink_ns_capable+0x2d/0x40
[ 6961.550351]  [<c49c9c54>] ? xprt_transmit+0x94/0x220
[ 6961.550354]  [<c48cd9e6>] rtnetlink_rcv_msg+0x76/0x1f0
[ 6961.550356]  [<c48cd970>] ? rtnetlink_rcv+0x30/0x30
[ 6961.550359]  [<c48eb35e>] netlink_rcv_skb+0x8e/0xb0
...
[ 6961.550412] Mem-Info:
[ 6961.550417] active_anon:30319 inactive_anon:25075 isolated_anon:0
 active_file:327764 inactive_file:152179 isolated_file:16
  unevictable:0 dirty:6 writeback:0 unstable:0
   slab_reclaimable:149091 slab_unreclaimable:18973
    mapped:18100 shmem:4847 pagetables:1538 bounce:0
     free:57732 free_pcp:10 free_cma:0
...
[ 6961.550492] 485897 total pagecache pages
[ 6961.550494] 1086 pages in swap cache
[ 6961.550496] Swap cache stats: add 16738, delete 15652, find
6708/8500
[ 6961.550497] Free swap  = 1656440kB
[ 6961.550498] Total swap = 1681428kB
[ 6961.550499] 785914 pages RAM
[ 6961.550500] 557663 pages HighMem/MovableOnly
[ 6961.550501] 12639 pages reserved
[ 6961.550506] atl1c 0000:05:00.0: pci_alloc_consistend failed
[ 6962.148358] psmouse serio1: synaptics: queried max coordinates: x
[..5772], y [..5086]

Order 4 allocation... probably doable during boot, but not really
suitable during resume.

I'm not sure how repeatable it is, but it definitely happened more
than once.

        /*                                                                      
         * real ring DMA buffer                                                 
         * each ring/block may need up to 8 bytes for alignment, hence the      
         * additional bytes tacked onto the end.                                
         */
        ring_header->size = size =
                sizeof(struct atl1c_tpd_desc) * tpd_ring->count * 2 +
                sizeof(struct atl1c_rx_free_desc) * rx_desc_count +
                sizeof(struct atl1c_recv_ret_status) * rx_desc_count +
                8 * 4;

        ring_header->desc = pci_alloc_consistent(pdev, ring_header->size,
                                &ring_header->dma);
        if (unlikely(!ring_header->desc)) {
                dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
                goto err_nomem;
        }

(Note the typo in dev_err... at least it is easy to grep).

Ok, so what went on is easy.. any ideas how to fix it?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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